20656270736 has 40 divisors (see below), whose sum is σ = 42449589600. Its totient is φ = 9709839360.

The previous prime is 20656270711. The next prime is 20656270741. The reversal of 20656270736 is 63707265602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219521 + ... + 299168.

It is an arithmetic number, because the mean of its divisors is an integer number (1061239740).

Almost surely, 2^20656270736 is an apocalyptic number.

It is an amenable number.

20656270736 is an abundant number, since it is smaller than the sum of its proper divisors (21793318864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20656270736 is a wasteful number, since it uses less digits than its factorization.

20656270736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518847 (or 518841 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 44.

The spelling of 20656270736 in words is "twenty billion, six hundred fifty-six million, two hundred seventy thousand, seven hundred thirty-six".